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overloading assignment operator problem

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Join Date: Oct 2009

Posts: 11

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ninreznorgirl2 ninreznorgirl2 is offline

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overloading assignment operator problem

Nov 6th, 2009

here is the overloaded function i have. I have to enter a float, for example, .123 or 0.123. if there is many zeros in front, then it will skip them over, and test for a decimal, then count the numbers in the end. and then print them out.

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 C++ Syntax (Toggle Plain Text) 
MyFloat& MyFloat::operator= (const char RightSide[])
{
    char ch;
    int k = 0;
 
    NumberOfDigits = 0;      
 
    if ( !cin.good() || (ch != '0' && ch != '.'))
        return *this;
 
    while( ch == '0' ||  isspace(ch))      
        cin.get(ch);                      
 
    if (ch != '.')
        return *this;
 
    cin.get(ch);
 
    while(isdigit(ch) && k < RightSide[k])  
    {                                      
         Number[k] = ch - '0';        
         k++;
         cin.get(ch);
    }
 
    NumberOfDigits = k;
    cin.putback(ch);
 
    for(k; k < MAX_DIGITS; k++)    //insert an end buffer of zeros
        Number[k] = 0;
 
  return *this;
}
MyFloat& MyFloat::operator= (const char RightSide[])
{
    char ch;
    int k = 0;
   
    NumberOfDigits = 0;      

    if ( !cin.good() || (ch != '0' && ch != '.'))
        return *this;

    while( ch == '0' ||  isspace(ch))      
        cin.get(ch);                      

    if (ch != '.')
        return *this;

    cin.get(ch);

    while(isdigit(ch) && k < RightSide[k])  
    {                                      
         Number[k] = ch - '0';        
         k++;
         cin.get(ch);
    }

    NumberOfDigits = k;
    cin.putback(ch);

    for(k; k < MAX_DIGITS; k++)    //insert an end buffer of zeros
        Number[k] = 0;

  return *this;
}

here is the code that is used to test the overloaded function:

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 C++ Syntax (Toggle Plain Text) 
void TestAssignment()
{
  MyFloat X;
  char    X_Str[100];
 
  cout << "\n------------  Testing \"=\" for MyFloat --------------------\n";
  do
    {
    cout << "\nEnter string holding float: ";
 
    cin.getline(X_Str, 100);
 
    X = X_Str;  // Call MyFloat = operator
 
    if ( X.Digits() == 0 )       //  Error in string format
      cout << "\nFormat error! ";
 
    cout << "\nAfter assignment,     'X = "<< X << "'" << endl;
    }
  while ( SpaceBarToContinue() );
}
void TestAssignment()
{
  MyFloat X;
  char    X_Str[100];

  cout << "\n------------  Testing \"=\" for MyFloat --------------------\n";
  do
    {
    cout << "\nEnter string holding float: ";
 
    cin.getline(X_Str, 100);

    X = X_Str;  // Call MyFloat = operator

    if ( X.Digits() == 0 )       //  Error in string format
      cout << "\nFormat error! ";

    cout << "\nAfter assignment,     'X = "<< X << "'" << endl;
    }
  while ( SpaceBarToContinue() );
}

the problem i am having with this is that it is going right into the if statement if i initialize ch with zero. but then if i put cin.get(ch) between the NumberOfDigits and the if statement, it works, but since there is the cin.getline in the testing function, it asks for a number twice, and i dont want it to do that. help?